Perhaps you should try some spelling variations:
"las cienicas sociales. tercera decada." » "las ciencas sociales. tercera decada.", "las ciencias sociales. tercera decada.", "las ciencis sociales. tercera decada.", "las cineticas sociales. tercera decada.", "las cronicas sociales. tercera decada."
"las ciencias sociais. tercera decada." » "las ciencias sociales. tercera decada.", "las ciencies socials. tercera decada.", "las ciencia social. tercera decada."

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("las ciencias sociais. tercera decada.") OR ("las cienicas sociales. tercera decada."))~.
• Removing quotes may allow a broader search: (( las ciencias sociais. tercera decada. ) or ( las cienicas sociales. tercera decada. ))~.
• Adding a wildcard symbol may retrieve word variants: (("las ciencias sociais. tercera decada.") or ("las cienicas sociales. tercera decada."))*.